# SW 指令测试
# 将 5 号寄存器的值修改为 0x80
# 将 4 号寄存器的值修改为 0xe0
# 将 0xe0 写入存储器地址为 0x18 的字
# 其余略

.text
addi   $5,$0,128      # base register
addi   $4,$0,224      # write data 0x000000e0    
sw     $4,-32($5)     # write byte addr  0x60  word addr 0x18
addi   $4,$0,-1       # write data 0xffffffff  -1
sw     $4,0($5)       # write byte addr  0x80  word addr 0x20   
addi   $4,$0,-32      # write data 0xffffffe0  -32
sw     $4,32($5)      # write byte addr  0xa0  word addr 0x28      
addi   $v0,$0,10      # exit 
syscall               # we are out of here.  
